Occultation event with (7641) Cteatus, event index number 727
Regions able to see the event: SAmericaS
Geocentric closest approach at 2025/02/27 06:55:26 UTC
J2000 position of star is 07:48:49.8 -18:58:17
Equinox of date position of star is 07:49:56.9 -19:02:08
Star is 132 degrees from the moon. Moon is 1% illuminated.
Stellar brightness G=13.6, apparent brightess of occulting body is G=14.5
Use an exposure time of 0.20 seconds with the standard RECON-QHY system.
Expected flux drop is 30% with SNR of 9.8 per integration
Apparent velocity is 13.6 km/sec on the sky relative to the star, or, 15.9 arcsec/hr.
The recommended exposure time corresponds to 2.7 km per image.
The 1-sigma error in the time of the event is 2.4 seconds.
The 1-sigma cross-track error in the shadow position is 32.1 km.
The sky-plane scale is 3089.6 km/arcsec.
Diameter estimates:
75.9 km assuming a 5% albedo, aximum of 5.6 sec for a central chord
31.0 km assuming a 30% albedo, maximum of 2.3 sec for a central chord
Cross-track diameter of 75.9 km used for deployment plan.
Star training set for 7641_Cteatus, (2025/02/27 06:55UT) Object RA Dec mag sep mel Adhara 06:59:36.9 -29:00:28 1.5 15.20 117 15Rho Pup 08:08:37.0 -24:22:42 2.8 6.88 132 PPM 219262 07:51:12.4 -19:35:18 6.1 0.63 132 PPM 219229 07:49:50.8 -19:14:21 7.4 0.20 132 PPM 219245 07:50:37.3 -18:54:26 9.0 0.20 133 7641_Cteatus 07:49:56.9 -19:02:08 14.5 133 Positions are for equinox of date
Star training set for 7641_Cteatus, (2025/02/27 06:55UT) Object RA Dec mag sep mel Adhara 06:58:37.6 -28:58:19 1.5 15.20 117 15Rho Pup 08:07:32.5 -24:18:14 2.8 6.88 132 PPM 219262 07:50:05.6 -19:31:24 6.1 0.63 132 PPM 219229 07:48:43.9 -19:10:30 7.4 0.20 132 PPM 219245 07:49:30.2 -18:50:33 9.0 0.20 133 7641_Cteatus 07:48:49.8 -18:58:17 14.5 132 Positions are for J2000